prithvi said:
Mate,I am really scared now.

.I love sports.I am passionate.What if I dont succeed in this field?
You'll know way before it's too late. And if you have the talent to really pull it off, it's going to become an issue of patience.
You're only 16, little man. Once you begin your higher education and start taking other courses, you might find something that not only makes more sense as a career path, but actually speaks to you. I started college in the states as a marketing major with intentions to jump into advertisement. I loved it, loved the earning potential, and was convinced of it until journalism started happening for me.
What's true for you now may not be true after two years of education, and whatever you change your mind to probably won't be true on the eve of graduation.
This, by no means, is to imply that you shouldn't pursue it. Learn the craft, try and master it (like we all still are), and be involved to whatever capacity your schedule can justify. Just don't be so sure of anything at an age where, quite honestly, you don't know anything.